Compare Resources
To compare the results of any search in the history use the Compare toolbar
button
of the Resources window to open the compare search results window.
To compare the results, specify which results you want to combine together and which you want to exclude. Lists of resources are quickly compared to see differences. For example, to find all resources in region IYCYZC3C and not in region IYCYZC3F you can select each region in the Region explorer and use the menu option Show Resources to create two search results, one for each region. Because these
are both stored in the history they are accessible using the Compare toolbar
button.
The left side of the Compare search results window, lists all the available
searches in the history, any which are checked have their results included
in the overall result. In the figure below the results of the search
"Resource for IYCYZ3C3" are selected so all resources in that
regions are included in the result.
The right side of the Compare search results window, lists all the available
searches in the histroy, any which are checked have their results excluded
from the overall result.
In the figure below the results of the search "Resource for IYCYZC3F" are selected, so any resources in this region are excluded from the result.

The overall result set combines all resources for searches checked in the
left side list that are not in any of the results from searches checked
in the right side list. This is shown below in the Resources view
where only one resource, the Map CSQ4CDM, is in Region IYCYZC3C and not
in Region IYCYZC3F.

You can select any number of searches in the history using the Compare
search results window, complex compound results of search inclusion and
exclusion can be built up.
Note: The Compare search results window relies on all of the searches
being complete, and works by comparing resources on the client workstation.
For large amounts of data it is more efficient to create a query that defines
the rules for resource inclusion and exclusion because this is run on the
server.